export default{
	namespaced:true,
	
	state:()=>({
		//购物车的数组，用来存储购物车中每个商品的信息对象
		//每个商品的信息对象，都包含以下6个属性
		//{goods_id,goods_name,goods_price,goods_count,goods_small_logo,goods_state}
		cart:JSON.parse(uni.getStorageSync('cart') || '[]')
	}),
	
	mutations:{
		addToCart(state,goods){
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			console.log(findResult)
			if(findResult){
				findResult.goods_count++
			}else{
				state.cart.push({
					...goods,
					goods_count:1
				})
			}
			this.commit('m_cart/saveToStorage')
		},
		saveToStorage(state){
			uni.setStorageSync('cart',JSON.stringify(state.cart))
		},
		//更新购物车中商品的勾选状态
		updateGoodsState(state,goods){
			const findResult = state.cart.find(x => x.goods_id === goods.goods_id)
			
			if(findResult){
				findResult.goods_state = goods.goods_state
				state.cart = [...state.cart] 
				this.commit('m_cart/saveToStorage')
			}
		},
		updateGoodsCount(state,goods) {
		    console.log('[Vuex] 更新数据:', JSON.stringify(goods, null, 2));
		    
		    const findResult = state.cart.find(x => x.goods_id === goods.goods_id);
		    if (findResult) {
		      findResult.goods_count = goods.goods_count;
		      state.cart = [...state.cart]; // 强制触发响应式更新
		      this.commit('m_cart/saveToStorage');
		    }
		},
		//根据Id删除对应商品
		removeGoodsById(state,goods_id){
			state.cart = state.cart.filter(x => x.goods_id !== goods_id)
			this.commit('m_cart/saveToStorage')
		},
		//更新购物车中所有商品的勾选状态
		updateAllGoodsState(state,newState){
			state.cart.forEach(x => x.goods_state = newState)
			
			this.commit('m_cart/saveToStorage')
		}
	},
	
	getters:{
		//购物车中所有商品的总数量
		total(state){
			return state.cart.reduce((total, item) => total + item.goods_count, 0)
		},
		//购物车中已勾选商品的总数量
		checkedCount(state){
			return state.cart.filter(x => x.goods_state).reduce((total,item) => total += item.goods_count,0)
		},
		checkGoodsAmount(state){
			return state.cart.filter(x => x.goods_state).reduce((total,item) => total += item.goods_count * item.goods_price,0).toFixed(2)
		}
	}
}